Update of the ACCORD Eye Study

Abstract

We wish to update our report on the Action to Control Cardiovascular Risk in Diabetes (ACCORD) Eye study (July 15, 2010, issue).¹ We made a mistake in the calculation of vision loss that also affected another article.² Our intent was to define moderate vision loss as a 15-letter decrease on the visual acuity score from baseline in either eye. However, in the analyses described in the published reports,^1,2 this calculation was erroneously made on the basis of the right eye only, resulting in fewer events as well as fewer people in whom a change in visual acuity could be ascertained. The published and revised numbers are presented in Table 1 ; the article is correct at NEJM.org. These changes do not materially change the conclusions of the study.